Hemorrhoid surgery a month and a half after the flow of yellow water, in addition to the normal phenomenon, mostly consider the wound infection caused. 1. Normal phenomenon: hemorrhoid surgery is an open surgery, so the trauma tissue is affected by metabolism, tissue fluid spillage, the phenomenon of running water, the secretion is generally yellow. Because it is a normal phenomenon, patients do not need to worry too much, close observation of the wound can be, regular outpatient review. 2. After hemorrhoid surgery, the anal wound is in an open state, subject to feces, intestinal fluids, urine and other pollution, clothing friction and other reasons, the formation of inflammatory reaction or infection phenomenon, resulting in increased wound infection secretion, the wound, in addition to the flow of yellow water, more accompanied by the surrounding skin will be red, swollen and painful, and in severe cases, may be suppurative infection. Therefore, it is recommended that after hemorrhoid surgery patients appear the above situation, need to go to the hospital in time to review, to find out the cause, if there is infection and other complications, as soon as possible to give treatment, to avoid delayed aggravation of the condition, affecting the normal recovery after surgery.